Identify the segment in the sentence which contains a grammatical error.
Please switch off / all the lights / before you / are leaving the room.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. are leaving the room
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The phrase "are leaving" uses the present continuous tense, which is not appropriate here. The sentence requires the simple present tense to indicate a general instruction.
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The correct phrase "leave the room" uses the simple present tense, which is suitable for instructions or actions that should occur regularly or in general.
So the corrected sentence is: "Please switch off all the lights before you leave the room."